Legal adviser of fugitive ex-PM Thaksin Shinawatra is seeking US assistance to solve Thailand's political conflicts as he tried to soften the image of the red shirts movement.
Noppadon Pattama, a ex-foreign minister, was speaking as he was on a mission to Washington.
"We hope that the US administration will be more engaged about the situation in Thailand. They can use diplomatic channels to encourage the government to look at our proposal," Noppadon said.
"It doesn't mean they interfere with Thai politics. You can give friendly advice to your friend -- it's just natural," he said.
"US-Thai relations are very important and if your friend is weak or is divided, your friend may not fulfill the potential that it has."
Noppadon accused the Abhisit government of misrepresenting the red shirts, saying: "I don't want the United States or the US population to misunderstand that the red shirts are terrorists."
"They are just farmers, they are just democracy lovers, they are people who dislike double standards," Noppadon said.
Noppadon declined to specify whom he was meeting in Washington, saying it could lead to repercussions. Diplomats said he would meet with staff members at Congress.
His mission comes two weeks after Abhisit dispatched to Washington a special envoy, Kiat Sittheeamorn, who explained the government's reconciliation plan to President Barack Obama's administration and lawmakers.